/***********************************************************************
 * BinTrotter : BitTorrent library/client for the Android operating system.
 *  
 * Copyright (C) 2009, Christopher David Stones (chris.stones@gmail.com)
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 ***********************************************************************/

package org.bintrotter.apeer.sendstates;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;

import org.bintrotter.apeer.Peer;

public class Port implements SendState {

	private Peer m_peer;
	private ByteBuffer bb;
	private SocketChannel sc;
	
	public Port(Peer peer) {
		
		m_peer = peer;
	}

	@Override
	public void reset() {
		
		short port = (short) m_peer.outPort();
		
		sc = m_peer.channel();
		if(bb == null) {
			bb = ByteBuffer.allocate(7);
			bb.putInt(3).put((byte)9).putShort(port);
		} else {
			bb.position(5);
			bb.putShort(port);
		}
		bb.rewind();
	}

	@Override
	public States update() {
		
		try {
			sc.write(bb);
			
			if(bb.hasRemaining() == false)
			{
				bb = null;
				sc = null;
				return States.IDLE;
			}
			
		} catch(IOException ioe) {

			bb = null;
			sc = null;
			return States.SHUTDOWN;
		}
		
		return States.HAVE;
	}

}
